{"product_id":"toyota-knuckle-ball-seal","title":"Toyota Knuckle Ball Seal","description":"\u003ch2\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003eToyota Heavy Duty Knuckle Ball Wiper Seal System\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan style=\"color: rgb(0, 60, 255);\"\u003e\u003cstrong\u003ePart # SKY-137301\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cstrong\u003ePrecision Parts \/ Proven Performance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eUpgrade the sealing system on your Toyota solid front axle with the \u003cstrong\u003eSky’s Offroad Design Heavy Duty Knuckle Ball Wiper Seal System\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eFactory-style Toyota knuckle wiper seals are a common maintenance item on older solid-axle trucks. Once the sealing system deteriorates, grease and contamination can begin working their way around the knuckle ball. A greasy buildup or leakage around the inside of the front wheel is one of the most obvious signs that the knuckle seals need attention. \u003cspan class=\"contents\"\u003e\u003cspan class=\"\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eSky’s system replaces the traditional sealing arrangement with a heavy-duty design built around \u003cstrong\u003eUltra High Durometer Polyurethane wiper seals\u003c\/strong\u003e, heavy steel retainers, corrosion-resistant components, and installation-friendly captive hardware.\u003c\/p\u003e\n\u003ch3\u003eHeavy Duty Polyurethane Wiper Seals\u003c\/h3\u003e\n\u003cp\u003eThe heart of the SKY-137301 system is our \u003cstrong\u003eUltra High Durometer Polyurethane knuckle ball wiper seal\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThese seals are designed to provide improved sealing and substantially longer service life compared with the traditional Toyota-style mesh\/felt sealing arrangement.\u003c\/p\u003e\n\u003cp\u003eEach seal is molded with the \u003cstrong\u003eSKY-137301\u003c\/strong\u003e part number directly into the component for easy identification.\u003c\/p\u003e\n\u003ch3\u003eHeavy Duty 1\/8\" Steel C-Ring Retainers\u003c\/h3\u003e\n\u003cp\u003eThe oil-seal retaining C-rings are formed from \u003cstrong\u003e1\/8-inch-thick steel\u003c\/strong\u003e, providing a strong and rigid retaining surface for the upgraded wiper seals.\u003c\/p\u003e\n\u003cp\u003eThe retainers feature a durable \u003cstrong\u003eblack E-coat finish\u003c\/strong\u003e to help resist corrosion, rust, and finish deterioration during long-term service.\u003c\/p\u003e\n\u003ch3\u003eSpacer Rings\u003c\/h3\u003e\n\u003cp\u003eThe system includes precision oil-seal spacer rings designed to work with the upgraded wiper and retaining system.\u003c\/p\u003e\n\u003cp\u003eThe spacer rings feature a \u003cstrong\u003esilver-zinc corrosion-resistant finish\u003c\/strong\u003e for long-lasting service in the demanding environment around the steering knuckle.\u003c\/p\u003e\n\u003ch3\u003eCaptive-Washer Hardware\u003c\/h3\u003e\n\u003cp\u003eIncluded are \u003cstrong\u003e16 hex-head cap screws with captive flat and lock washers\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eThe captive washer design keeps the hardware together during installation, eliminating the frustration of handling and potentially losing individual small washers while working around the axle housing.\u003c\/p\u003e\n\u003cp\u003eHardware features a \u003cstrong\u003esilver-zinc corrosion-resistant finish\u003c\/strong\u003e for extended service life.\u003c\/p\u003e\n\u003ch3\u003eVehicle Fitment\u003c\/h3\u003e\n\u003cp\u003eDesigned for Toyota \u003cstrong\u003e4WD solid-front-axle applications\u003c\/strong\u003e. Based on the solid-axle application information referenced by Go-Parts, this family includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e1979–1985 Toyota Pickup 4WD\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e1984–1985 Toyota 4Runner 4WD\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1976–1990 Toyota Land Cruiser\u003c\/strong\u003e, including applicable FJ40, FJ60 and FJ62 solid-front-axle models\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis system is \u003cstrong\u003enot intended for Toyota IFS front suspension applications\u003c\/strong\u003e. Go-Parts specifically notes that the 1986-and-later Pickup IFS knuckle arrangement is fundamentally different from the earlier solid-axle design. \u003cspan class=\"contents\"\u003e\u003cspan class=\"\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eVerify axle configuration and application before ordering.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eWhen Should You Service the Knuckle?\u003c\/h3\u003e\n\u003cp\u003eGrease or oily buildup around the back of the steering knuckle—or a greasy mess appearing on the inside of the front wheel—is a strong indication that the existing sealing system is no longer doing its job. \u003cspan class=\"contents\"\u003e\u003cspan class=\"\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eBecause accessing the wiper seals requires substantial front-axle disassembly, this is also an excellent opportunity to inspect the rest of the knuckle assembly.\u003c\/p\u003e\n\u003cp\u003eWorn \u003cstrong\u003etrunnion\/kingpin bearings, inner axle seals, wheel bearings, races and other internal wear components\u003c\/strong\u003e are common causes of problems attributed to the knuckle assembly. In many cases, the knuckle housing itself is still serviceable and the proper repair is rebuilding the wear components rather than replacing the casting. \u003cspan class=\"contents\"\u003e\u003cspan class=\"\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eImportant Installation Note\u003c\/h3\u003e\n\u003cp\u003eWhen performing a complete Toyota knuckle rebuild, \u003cstrong\u003ekingpin\/trunnion bearing preload must be properly set\u003c\/strong\u003e. \u003ca href=\"https:\/\/www.skysoffroaddesign.com\/products\/toy-krk-001\" title=\"Knuckle rebuild link\"\u003eKnuckle rebuild kits with trunnion bearings available here\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eThe preload is checked with a spring scale and adjusted using the appropriate bearing shims. Incorrect preload can contribute to steering wobble when too loose, or excessive steering effort and premature bearing wear when too tight. Refer to the appropriate Toyota Factory Service Manual for your specific axle and vehicle before setting preload or torque specifications. \u003cspan class=\"contents\"\u003e\u003cspan class=\"\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eOne SKY-137301 system includes components for both sides of the front axle:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2 × Ultra High Durometer Polyurethane knuckle ball wiper seals\u003c\/li\u003e\n\u003cli\u003e4 × Heavy-duty 1\/8\" steel C-ring retainers\u003c\/li\u003e\n\u003cli\u003e2 × Oil-seal spacer rings\u003c\/li\u003e\n\u003cli\u003e16 × Hex-head cap screws\u003c\/li\u003e\n\u003cli\u003eCaptive flat and lock washers\u003c\/li\u003e\n\u003cli\u003eCorrosion-resistant coated components\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSky’s Offroad Design — Precision Parts \/ Proven Performance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFor the technical background on the Toyota solid-axle knuckle and rebuild process, the Go-Parts reference used here is available at \u003cspan class=\"contents\"\u003e\u003cspan class=\"\"\u003e\u003ca class=\"decorated-link\" rel=\"noopener\" href=\"https:\/\/www.go-parts.com\/garage\/steering-knuckle-toyota-4runner-toyota-land-cruiser-toyota-pickup-1976-1990?utm_source=chatgpt.com\" target=\"_blank\"\u003eGo-Parts Toyota Solid Axle Steering Knuckle Guide\u003c\/a\u003e\u003c\/span\u003e\u003c\/span\u003e.\u003c\/p\u003e","brand":"Sky's Offroad Design","offers":[{"title":"Default Title","offer_id":45182090248258,"sku":"137301","price":87.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0758\/4325\/files\/ChatGPTImageSep9_2026_04_12_15PM.png?v=1788997043","url":"https:\/\/www.skysoffroaddesign.com\/products\/toyota-knuckle-ball-seal","provider":"Sky's Offroad Design","version":"1.0","type":"link"}